ABYC SYSTEMS LATEST ACTUAL UPDATED
QUESTIONS AND ANSWERS SURE A+
✔✔T/F ABYC requires double-clamping at thru-hull fittings. - ✔✔False. Only the ISO
requires two clamps.
✔✔What causes de-zincification? - ✔✔Stray current leak.
✔✔Pros and cons regarding lip-type dripless seals? - ✔✔They can fail without
lubrication, they wear on the shaft, debris an issue. Cooled by oil reservoir or raw water
from engine. They are easily replaceable.
✔✔Pros and cons regarding PSS (pack less sealing system) carbon ring seals? -
✔✔Carbon face must be pristine, shaft must be properly aligned. They last very long.
Lubricated by seawater.
✔✔The exhaust system shall be _____ to the hull interior. - ✔✔Gas-tight
✔✔LPG locker ventilation must flow: - ✔✔Directly overboard
✔✔What is the typical working pressure for an LPG system? - ✔✔.4 psi after the
pressure regulator
, ✔✔Each LPG system shall be fitted with a pressure gauge reading the _____ side of
the pressure regulator - ✔✔Cylinder pressure
✔✔The purpose of the gauge is to - ✔✔Easily test the system for leaks.
✔✔A relief valve's point of discharge shall be at least ___ from any cabin opening or
hull interior. - ✔✔20 inches
✔✔LPG lockers shall be vented at the bottom by a dedicated vent with a minimum
diameter of any component in the vent system not less than ____ inside diameter -
✔✔1/2"
✔✔Flexible LPG supply lines shall be fitted with _____ - ✔✔Permanently attached
fittings
✔✔LPG lockers shall be installed so that the locker opens directly: - ✔✔To open
atmosphere.
✔✔Regulator is connected directly or through a pigtail hose to ____ and reduces tank
pressure to ____. - ✔✔Tank valve, .5 psi
✔✔The pressure gauge must be mounted ______ the regulator - ✔✔Before (testing the
tank side pressure)
✔✔An air conditioner coolant pump must be mounted - ✔✔Below the waterline
✔✔Which types of pump can be classified as variable displacement? - ✔✔Diaphragm,
Impeller, piston.
✔✔A check valve may only be used to: - ✔✔Prevent an automatic bilge pump from
cycling on and off (due to backflip from the discharge line)
✔✔Pump discharge capacity may be reduced by: - ✔✔Length of discharge pipe,
number of radius, roughness of the interior of hose.
✔✔CEntrifugal pump in air conditioning systems must be mounted _____ and is not
_______ - ✔✔Below waterline, self-priming.
✔✔AC raw water strainer must be installed ___ pump. - ✔✔Before
✔✔Condensate drains shall not terminate within ____ of exterior engine exhaust outlets
or in _____ - ✔✔3 feet; an engine compartment.
QUESTIONS AND ANSWERS SURE A+
✔✔T/F ABYC requires double-clamping at thru-hull fittings. - ✔✔False. Only the ISO
requires two clamps.
✔✔What causes de-zincification? - ✔✔Stray current leak.
✔✔Pros and cons regarding lip-type dripless seals? - ✔✔They can fail without
lubrication, they wear on the shaft, debris an issue. Cooled by oil reservoir or raw water
from engine. They are easily replaceable.
✔✔Pros and cons regarding PSS (pack less sealing system) carbon ring seals? -
✔✔Carbon face must be pristine, shaft must be properly aligned. They last very long.
Lubricated by seawater.
✔✔The exhaust system shall be _____ to the hull interior. - ✔✔Gas-tight
✔✔LPG locker ventilation must flow: - ✔✔Directly overboard
✔✔What is the typical working pressure for an LPG system? - ✔✔.4 psi after the
pressure regulator
, ✔✔Each LPG system shall be fitted with a pressure gauge reading the _____ side of
the pressure regulator - ✔✔Cylinder pressure
✔✔The purpose of the gauge is to - ✔✔Easily test the system for leaks.
✔✔A relief valve's point of discharge shall be at least ___ from any cabin opening or
hull interior. - ✔✔20 inches
✔✔LPG lockers shall be vented at the bottom by a dedicated vent with a minimum
diameter of any component in the vent system not less than ____ inside diameter -
✔✔1/2"
✔✔Flexible LPG supply lines shall be fitted with _____ - ✔✔Permanently attached
fittings
✔✔LPG lockers shall be installed so that the locker opens directly: - ✔✔To open
atmosphere.
✔✔Regulator is connected directly or through a pigtail hose to ____ and reduces tank
pressure to ____. - ✔✔Tank valve, .5 psi
✔✔The pressure gauge must be mounted ______ the regulator - ✔✔Before (testing the
tank side pressure)
✔✔An air conditioner coolant pump must be mounted - ✔✔Below the waterline
✔✔Which types of pump can be classified as variable displacement? - ✔✔Diaphragm,
Impeller, piston.
✔✔A check valve may only be used to: - ✔✔Prevent an automatic bilge pump from
cycling on and off (due to backflip from the discharge line)
✔✔Pump discharge capacity may be reduced by: - ✔✔Length of discharge pipe,
number of radius, roughness of the interior of hose.
✔✔CEntrifugal pump in air conditioning systems must be mounted _____ and is not
_______ - ✔✔Below waterline, self-priming.
✔✔AC raw water strainer must be installed ___ pump. - ✔✔Before
✔✔Condensate drains shall not terminate within ____ of exterior engine exhaust outlets
or in _____ - ✔✔3 feet; an engine compartment.
